DocumentCode :
1439433
Title :
Homopolar motor with high temperature superconductor field windings
Author :
Superczynski, M.J. ; Waltman, D.J.
Author_Institution :
Carderock Div., Naval Surface Warfare Center, Annapolis, MD, USA
Volume :
7
Issue :
2
fYear :
1997
fDate :
6/1/1997 12:00:00 AM
Firstpage :
513
Lastpage :
518
Abstract :
A superconducting field winding, assembled with discrete coils wound with bismuth 2223 high temperature superconducting (HTS) wire, has been successfully operated in an electric homopolar motor designed and built by the Naval Surface Warfare Center. The motor´s field winding is composed of two HTS coils fabricated by American Superconductor Corporation and two HTS coils fabricated by Intermagnetics General Corporation. These field winding coils were produced for the Navy under contracts with the Naval Research Center. At a HTS field winding operating temperature of 4.2 K, the motor produced 125 kW (167 hp) of output power. At a temperature of 28 K the motor power developed was 91 kW (122 hp). In comparison to other motor types, a homopolar motor provides an ideal operating environment for a superconducting magnet. The design, construction, and operating characteristics of this machine are described. Information describing the HTS field winding and its superconducting capabilities is presented along with that for the laboratory test facility used to measure the performance of the machine. Motor measured performance results and those predicted by computer simulation are compared and presented. An assessment of the state of the engineering development of HTS superconductors for magnet applications and recommendations for future development are made.
Keywords :
electric propulsion; high-temperature superconductors; homopolar motors; machine windings; ships; superconducting coils; superconducting machines; 122 hp; 125 kW; 167 hp; 28 K; 4.2 K; 91 kW; American Superconductor Corporation; Intermagnetics General Corporation; Naval Research Center; Naval Surface Warfare Center; bismuth 2223; computer simulation; high temperature superconducting wire; high temperature superconductor field windings; homopolar motor; laboratory test facility; motor field winding; operating characteristics; performance measurement; ship electric propulsion; Assembly; Bismuth; Contracts; High temperature superconductors; Homopolar machines; Magnetic field measurement; Superconducting coils; Superconducting filaments and wires; Superconducting magnets; Wounds;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.614554
Filename :
614554
Link To Document :
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